Hi Theo,
apparently Mozilla has removed the ability to disable the crash protection for Silverlight only. It's all or nothing now, I'm afraid.
To disbale crash protection:
1.Type about:config in the URL box and, if necessary, click "I’ll be careful , I promise"
2.Search for ipc in Filter box .
3.Double click on dom.ipc.plugins.enabled to set the value to false.
4.Restart Firefox .That’s it, "plugin–container/crash protection" is disabled.
This will disable the infamous crash protection for all plug-ins, including Adobe Flash. The drawback of this approach is that if a plug-in genuinely crashes, the crash will propagate to Firefox itself; on the other hand, with the protection turned on a crash only affects the web pages that use the crashing plug-in.
Alternatively, to remove the main source of trouble within EPPI-Reviewer, but keep Firefox Crash protection active, you may:
1.Type about:config in the URL box and, if necessary, click "I’ll be careful , I promise"
2.Search for ipc in Filter box .
3.Set the value of dom.ipc.plugins.timeoutSecs to -1
4.Restart Firefox .
This prevents Firefox to mistakenly assume that EPPI-Reviewer 4 has stopped responding (usually happens when waiting for the user to click on a dialog box) and subsequently shutting down the application.
I hope this helps,
Sergio